@article {su2009modified, title = {Modified test statistics by inter-voxel variance shrinkage with an application to fMRI}, journal = {Biostatistics, NIHMSID: 316409}, volume = {10}, number = {2}, year = {2009}, pages = {219-227}, author = {Su, S and Caffo, B and Garrett-Mayer, E and Bassett, S} }